BEGONIACEAE 1. BEGONIA Linnaeus, Sp. Pl. 2: 1056. 1753.

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BEGONIACEAE
80. Begonia lanternaria Irmscher, Mitt. Inst. Allg. Bot. Hamburg
10: 555. 1939.
灯 果 秋 海 棠 deng guo qiu hai tang
Herbs. Rhizomes elongate. Leaves basal; stipules caducous,
oblong-ovate, 9–10 × 4–5 mm, membranous; petiole 8–23
cm, sparsely villous; blade abaxially pale brown-green, adaxially
deep brown-green, ovate to broadly ovate, asymmetric, 11–
13 × 12–14 cm, glabrous, venation palmate, 5-veined, base
strongly oblique, deeply cordate, margin densely minutely serrulate,
apex shortly caudate. Inflorescences 18–25 cm tall, glabrous;
bracts broadly elliptic to broadly ovate, 5–9 × ca. 5 mm,
margin glandular ciliate. Staminate flowers: pedicel 9–10 mm;
tepals 4, pinkish, outer 2 broadly ovate, 7–9 × 6–7 mm, abaxially
subglabrous, inner 1 oblong, ca. 6 × 2 mm; stamens numerous;
filaments ca. 1.8 mm; anthers cuneate-obovoid, ca. 1
mm, apex emarginate. Pistillate flowers: pedicel ca. 2 cm; tepals
3, pinkish, outer 2 broadly ovate, inner 1 smaller; ovary
glabrous, 1-loculed; placentae parietal, bilamellate; styles 3.
Capsule nodding, oblong-ovoid, ca. 1.2 cm, unequally 3-
winged; abaxial wing subtriangular; lateral wings smaller. Fl.
Aug, fr. Sep.
On limestone rocks at forest margins. Guangxi (Longzhou) [N
Vietnam].
81. Begonia leprosa Hance, J. Bot. 21: 202. 1883.
癞 叶 秋 海 棠 lai ye qiu hai tang
Begonia bretschneideriana Hemsley.
Herbs, creeping. Rhizomes 5–14 mm in diam. Leaves basal;
stipules caducous, ovate, (5–)15–23 mm, membranous, apex
cuspidate; petiole 4–13 cm, glabrous to densely brown villous
when young; blade sometimes very shallowly peltate, suborbicular,
obovate, or broadly ovate, asymmetric, 4–15 × 4.5–
21 cm, abaxially glabrous to brown villous, adaxially glabrous,
venation palmate, 5–7-veined, base oblique, cordate, margin
remotely and minutely serrulate, apex acute or shortly caudate.
Inflorescences usually reduced, 1–1.5(–7) cm; bracts ovate,
3.5–15 mm, membranous, margin ciliate. Staminate flowers:
pedicel 2–8 mm, glabrous to sparsely villous; tepals 4, white to
pink, glabrous, outer 2 abaxially reddish on veins, broadly ovate,
7–26 × 8–29 mm, inner 2 oblong, 5–27 × 2–9 mm; stamens 21–
78, free; filaments 0.6–3.8 mm; anthers obovoid to subglobose,
1.1–2.6 mm, apex emarginate. Pistillate flowers: pedicel 4–20
mm; tepals 3, white to pink, glabrous, persistent in fruit, outer 2
abaxially reddish on veins, broadly obovate or suborbicular, 7–
18 × 8–18 mm, inner 1 obovate-oblong, ca. 7 × 4 mm; ovary
glabrous, 3-loculed; placentae axile, undivided or bilamellate;
styles 3, free; stigmas 2-cleft, spiraled. Fruit pendulous, clavate,
1.1–2.2 cm, wingless. Fl. May–Sep, fr. Jun–Oct.
● Semiopen forests or scrubby vegetation, on limestone rocks;
100–800 m. Guangdong, Guangxi.
This is a common species.
82. Begonia limprichtii Irmscher, Repert. Spec. Nov. Regni Veg.
Beih. 12: 440. 1922.
蕺 叶 秋 海 棠 ji ye qiu hai tang
Begonia houttuynioides T. T. Yu.
Herbs. Rhizomes elongate; internodes distinct. Leaves
basal; stipules caducous, ovate-triangular, 5–7 mm, glabrous,
apex acuminate; petiole 3–8 cm, densely brown villous; blade
ovate or broadly ovate, asymmetric, 5–8 × 4–7 cm, abaxially
villous, adaxially red setose, venation palmate, 7-veined, base
shallowly cordate, margin remotely and irregularly denticulate,
very shallowly divided, apex shortly caudate or acuminate. Inflorescences
8–16 cm tall, subglabrous or glabrous; peduncle 1–
1.3 cm; bracts ovate-lanceolate, 6–10 × 2–4 mm, margin ciliate,
apex acuminate and shortly cuspidate. Staminate flowers: pedicel
ca. 4 mm; tepals 4, white or rarely pink, outer 2 broadly
ovate, 1.8–2 × ca. 1.5 cm, abaxially pilose, inner 2 broadly
elliptic, ca. 10 × 5 mm; filaments 1–2 mm; anthers obovoid, ca.
0.8 mm, apex emarginate. Pistillate flowers: pedicel ca. 2.2 cm;
ovary pilose, 2-loculed; placentae axile, bilamellate; tepals 4 or
5, unequal, largest suborbicular, broadly oblong, or broadly
ovate, 1.5–1.6 cm, smallest oval or oblong, (3–)10 × (2–)5 mm;
styles 2, fused to halfway; stigmas 2-cleft, spiraled. Capsule
nodding, obovoid-oblong, 10–13 × 7–9 mm, unequally 3-
winged; abaxial wing ligulate, 13–17 × 5–9 mm; lateral wings
3–5 mm. Fl. Jun, fr. Aug. 2n = 22*.
● Mountain slopes; 500–1700 m. Sichuan, Yunnan.
This species is similar to Begonia ruboides but differs by its very
shallowly lobed leaf blade and 2-loculed ovary.
83. Begonia lipingensis Irmscher, Mitt. Inst. Allg. Bot. Hamburg
6: 353. 1927.
黎 平 秋 海 棠 li ping qiu hai tang
Herbs, rhizomatous. Stems erect, 7–18 cm tall. Leaves
mostly basal; stipules caducous; petiole 9–19 cm, rusty villous;
blade broadly ovate, slightly asymmetric, 4–6 × 4–6 cm, abaxially
sparsely hairy, adaxially hairy, venation palmate, 6- or 7(or
8)-veined, base slightly oblique, cordate, margin irregularly denticulate,
distinctly lobed, divided to more than 1/2 of leaf length;
lobes 6 or 7(or 8), oblong-ovate or triangular, apex acuminate.
Inflorescences 6–12 cm, usually glabrous. Staminate flowers:
pedicel 1.5–2.3 cm; tepals 4, pink, outer 2 broadly ovate, 1.4–
1.7 × 1.4–1.7 cm, base slightly cordate, abaxially rusty villous,
inner 2 obovate, 1–1.1 cm × 6–7 mm; stamens numerous; filaments
ca. 3 mm, fused to halfway; anthers oblong-obovoid, ca.
1.2 mm. Pistillate flowers: pedicel ca. 1.3 cm; tepals 6; ovary
villous, 2-loculed; placentae axile, bilamellate. Capsule nodding,
abaxial wing ca. 1.1 cm, apex rounded; lateral wings ca. 2
mm. Fl. Jul–Aug.
● Forests, scrubby vegetation, on rocks in shaded moist environments;
300–1100 m. Guangxi, Guizhou, Hunan.
This species is similar to Begonia digyna but differs by its larger
staminate flowers.
84. Begonia lithophila C. Y. Wu, Acta Phytotax. Sin. 33: 257.
1995.
石 生 秋 海 棠 shi sheng qiu hai tang
Herbs, deciduous. Tubers 8–15 mm in diam. Leaves 1 or
2, basal; stipules caducous; petiole 2–12 cm, glabrous or subglabrous;
blade often reddish abaxially, 5-parted, asymmetric,